I'm interested in trying to seal an old pond. It has a leak somewhere around the dam. The pond is approximately 30 years old with a soft silt bottom. How well would bentonite work for a situation like this. I would like to apply the bentornite crystals as opposed to lowering the lake an mixing the bentonite that way. Please let me know if anyone has used this product and if it did or didn't work for you.

Thanks